What should you do if you observe a defect on a passing train?

If you observe a defect on a passing train, notifying the crew by radio is the appropriate action to take. This is essential for ensuring the safety and efficiency of rail operations. By contacting the crew, you provide them with timely information about potential hazards that could impact their operations or the safety of the train. The crew is best positioned to assess the situation and take immediate corrective actions if needed.

This course of action also aligns with safety protocols, as it minimizes the risk of an incident occurring due to unresolved defects. Prompt communication can prevent accidents and ensure that any issues are addressed before they escalate.

Other options, such as ignoring the defect, would compromise safety and could lead to serious consequences if the defect is significant. Reporting to local authorities might delay immediate action while the crew is the frontline team responsible for managing train safety. Taking a photo, while potentially helpful for documentation, does not address the urgent need for the crew to be aware of the defect directly and immediately.